252320642569 has 2 divisors, whose sum is σ = 252320642570. Its totient is φ = 252320642568.

The previous prime is 252320642531. The next prime is 252320642591. The reversal of 252320642569 is 965246023252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165876998400 + 86443644169 = 407280^2 + 294013^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252320642569 is a prime.

It is a super-2 number, since 2×252320642569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252320642069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126160321284 + 126160321285.

It is an arithmetic number, because the mean of its divisors is an integer number (126160321285).

Almost surely, 2^252320642569 is an apocalyptic number.

It is an amenable number.

252320642569 is a deficient number, since it is larger than the sum of its proper divisors (1).

252320642569 is an equidigital number, since it uses as much as digits as its factorization.

252320642569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 252320642569 in words is "two hundred fifty-two billion, three hundred twenty million, six hundred forty-two thousand, five hundred sixty-nine".